Just Mutual Satisfaction

My father died when I was 13 and my mother remarried just as I went off to university. On finishing university, I bought my own home using my trust fund. So, I was setup before starting my career and I even acquired a carpet cleaner when buying my household furniture. It had been suggested and so I got one, I was told later I didn't really need one by my mother, but she said it would get used by her and her sister so wouldn't go to waste. My aunt would burrow it regularly when my uncle was away, she got bored and so cleaned the carpets and rugs with it. I had given her a key to let herself in to get if I was out. Then before Christmas last year I'd been at the Christmas party at my work and got home around 3am and had started undressing, but instead of going to my bedroom crashed on the lounge in T-shirt and shorts. Around 11am or so my aunt came for carpet cleaner and saw me laying on the lounge. I awoke to her sucking my cock, she said I'd a hard-on and she had decided to get it down for me. I wasn't fully aware you could say, but I liked her sucking my cock and we ended up in my bed fucking. She had to stay busy when my uncle was away, to keep her mind off sex. Seeing me laying there she took the opportunity, and it led to us fucking. Of course, that led to us having regular sex when my uncle was away. I was between girlfriends and a willing aunt is a great backup. I started checking out female relatives, but didn't find another who was a possibility of a sex partner like my aunt. Till I saw my stepsister 4 years younger than myself and hadn't gone to university and worked in a dress shop. She had no boyfriend and was struggling to support herself living alone. It was my aunt who suggested she move in with me and save on rent while at a family get together. We were mostly strangers as we had very little contact since her father married my mother. It didn't concern me either way, but she finally agreed and moved in with me. Shortly (2months) after the dress shop closed down and she was out of work. No advance warning just suddenly closed down; it also didn't concern me all that much. I came home from working and saw my aunt's car in the driveway and thinking she was over for sex got aroused. I entered the house and no sign of her and thinking she might be in my bedroom went upstairs. I heard moaning coming from my stepsister's bedroom and had peek in and saw my aunt getting it on with my stepsister. I was soon seen and asked to join in and so I did, fucking my stepsister first and then my aunt. After that day in July my stepsister we're now in a full relationship, with my aunt as a regular addition. She is also pushing me to marry my stepsister, which I'm quite willing to do. But yet to ask her. It started with a blowjob and then a sexual relationship for our mutual satisfaction and now it may lead to me marrying my stepsister.